$100 Battery Spot Welder II Sequre - SW2 Review II 18650 Lithium Cell
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- Опубліковано 8 чер 2024
- This is a really good, affordable option for welding nickel strip up to 0.15mm
Spot welder (affiliate links):
Aliexpress: s.click.aliexpress.com/e/_9QLorv
Sequre: bit.ly/3o3KpkI (use coupon code "SCHEMATIX" to get a discount)
Miniware Screwdriver:
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Sequre SW2 Spot Welder: bit.ly/3o3KpkI
0:00 Intro
0:30 Unboxing
3:05 Spot weld testing
8:24 Conclusion
9:26 Teardown
12:11 Outro
Schematix - Наука та технологія
Currently, the SW2 is on sale for $94 for the next few days. If you would like to support my channel, then please use my affiliate link :) bit.ly/3o3KpkI
Is the a way to change the firmware to get a little bit more time/current out of it, bro?
Did you ever think about adding in a capacitor inside connected to those battery screws on the main pcb? In theory that should give it a bit more grunt (higher than the Lipo batts could do on their own) seeing the mosfets are rated to be able to handle the current. Is that something you could try or test please ?
@schematix Did you ever think about adding in a capacitor inside connected to those battery screws on the main pcb? In theory that should give it a bit more grunt (higher than the Lipo batts could do on their own) seeing the mosfets are rated to be able to handle the current. Is that something you could try or test please
is it 0.15mm pure nickel strip or nickel plated u are saying talking about
I bought one or these after watching the videos thinking I wouldn’t need to buy another one. After waiting 3 weeks with no tracking details I got it and it worked good for the first 35 welds, after that it didn’t even went to boot up anymore. Said my battery was low even being charged for 4 hours. No power going to the leads. Spoke to the company and they sent me a defective board to replace and that took 2 weeks to come. Then accused me of wrongful install when I shouldn’t have to install a product that shouldn’t be broken. After I checked out the 2 boards I realized that the new board had 2 clips soldered wrong and it was shorting out of welder. All in all I’m pretty done with sequre as they really don’t understand that customers are the ones that make the company, not the other way around.
I have the non-LCD version and guys, this is the way to go. I build battery packs for my solar array and it works great!
exactly the review I was looking for
bought it and i love it. Full recommendation.
I don't think you had the electrodes installed completely, hence they got hot during the multiple weld test. I believe the rounded tips are friction fit collets, and pull out of the handles. You then slide the electrode all the way into the collet, and push the collet back into the handle.
Try using less pressure on the electrodes, I've found in the past that not pushing as hard resulted in much better welds for similar settings on other cheap spot welders.
I found the same thing by accident using my el-cheapo $25 spot welder... Was attempting the weld using varying pressures and found quite by accident (was moving the leads around when it went off and behold, it actually worked fine ;-)
Looking at a few reviews for devices like this (battery based) you're spot on. Trend is to apply as little pressure as possible, also using as little contact as possible with the probes (use thin edge to increase resistance).
@@tonyhawk123 spot on!! Makes since when you think about it, more current trying to flow through a lite connection causes more localized heat which is what you want👍
@@n7565j What welder did you buy?
@@mscir it was a generic $25 spot welder on ebay, haven't seen ant name on it, just a Chinese knock off I suppose. But it seems to work as long as you hook it to a battery, I use a 4 wheeler battery and it works great👍👍
thanks for taking the time....... great
Before I saw this video I bought the SeeSii. This solve the biggest issue I had with the SeeSii (They turned the display around).
This has the display and probes facing the user!
Schematix, what would be your suggestion for a cheap rework station with soldering tweezers and hot air gun please? I am looking for one unit to do the lot, as I have already taken up your advice and bought the soldering 7s850p (i think that was the model number of the top of my head). Unfortunately, workshop space as at a premium, so I would like a single multitask unit. Also, if I can buy from an Australian seller of aiexpress or ebay etc.
BEST REVIEW AND TESTING IN UA-cam !!!!! KEEP UP THE GREAT WORK !!!!! 12 MORE SUBSCRIPTION ON YOUR WAY ~~~~~
Very well explained
If there is a version with 8 MOSFETs instead of 6 it might have faired better with the last test, if such a device exists…
Nice presentation style. Keep rockin.
battery voltage is too low, it does a bit better when actually connected to the charger but it's still almost nothing compared to a kWeld with a €60 LiPo, granted it costs almost 3 times more but it certainly is more than 3 times better
the Sequre does 0.15 nickel plated steel (not pure nickel) with like 70% of it's max, the kWeld can go up to 500J, yet it gets the same welds on the same crap strip at only 10J, so the kWeld, even with a "cheap" LiPo, is like 35 times more powerful
and even more important than the power: CONSISTENT, you use a set J value and it's the same every time
every x welds the sequre gets seemingly less powerful, which is normal as it doesn't adjust the output time to compensate for lower voltage
Did you try setting the max time length for the .2mm thick and then spot weld twice in the same spots?
Was wondering if you would set your contact points closer together, not push down as hard and what would happen if you for 0.2 mm thick pure nickel strip like you used would turn the delay to zero and the power to max as you hit the first weld you would raise a contact probe up and put it right back down again for 3 times. If this created a good weld you would have to be careful how many welding pulses you performed so you don't overheat it. This might give you a way to weld 0.2mm pure nickel strips if you had to use these. I know this is alittle crazy but if it worked you could use the full range of 0.1mm, 0.15mm and 0.2mm.
I was just wondering what got you interested in that screwdriver in the first place? And it looks so cool.
Woah that one looks nice !
Do you recommend this version (SW2) over the other version. I found this much better from videos, but the other one is advertised to weld up to 0.3mm thickness, but have not found any video making experiment and proving it. Both versions were tested up to 0.2mm nickel. Could you please share your views? Thanks.
It would be a nice tool for those that rebuild power tool battery packs, like the NIMH or NICD, for guys that service older tools.
It's not just a matter of pressure, although it partially is because the more pressure the more metal on metal surface area you're contacting so the welds are not as good with weak units, the other important part is distance, the less distance between the contacts the better the weld on thicker metal as it has less metal to heat up into melting and the less power you use to weld on thinner strips.
Do you think hitting the same location with a second weld would Help , to make it a stronger weld ?
curious if you ever tried double welding the same spot at 0.2 strip as quickly as the 2nd pulse is possible?
Hey mate I'm rectifying 110v AC to DC what capacitor would I need it will be going into a variable speed controller to run DC motors.
I had a spot welders with same MOSFET and it made magic smoke but it didn't have the brass on MOSFET mine was a noke off
Can I spot weld full charge 18650. Ths is because I bought some 18650 batteries, they are between 3.2v to 3.5v. Is it all batteries to have the same voltage before spot weld, so I’m thinking to charge all batteries to full before weld but is it ok to spot weld them at full charge capacity voltage
I would love something like this, wiht an option to connect to main lines for a little more power. The size factor is perfect for hobby usage
@@E-BikingAdventures I can’t even make sense of it. What main lines? Mains voltage?
Is there any ability to update the firmware to increase the weld duration? It looks like it would be capable for at least 150ms maybe 200ms.
Is it when the internal battery dead, it can not be use anymore?
Is there any reason you can't just weld another .15 strip to the first?
Good work.
Nice machine ✔️
What would happen if you made a weld twice at the same location on the heaver strips?
makes a hole on the metal..
@@mitropoulosilias I meant two or more welds, not one on top of the other. I do fabrication, so I knew this wouldn't work, even on a battery.
I've seen 3 welds on the same tab when they stacked strips. Looked good and stayed together.
The first 3 numbers designate the battery size in dimensions, this is a 107080 (10x70x80mm)
On the .2mm could you do a double weld without moving the electrodes. In other word double weld same spot. At the max of 99ms would that work or risk damaging battery
I thought the same, but double welding in quick succession didn't make it any stronger unfortunately
@@Schematix maybe it's worth trying to gently press on the electrodes (only touching the metal strips with them) as some people suggested here and making a review to see the results :D
I'm working using 0.1mm,this kind is for me hehe :D
Shouldn't you ideally be using those H-shaped Nickel Strips with a gap in-between the two welding spots that encourages the flow of electricity from the Electrodes to go Electrode A > Strip > Battery > Strip > Electrode B instead of just Electrode A > Strip > Electrode B and potentially just grazing the battery underneath the Strip? 🤔
I couldn't find them on short demand for a refurbishment project, so I went and just bought a pack of precut normal ones and cut my own gaps in them using a Proxxon Cutting Disk and had no issues whatsoever using the in my kWeld Manual recommended values from reusing the 0.3mm Terminals and a new 0.1mm Strip for the bridging 😁
Yep I noticed a difference when I began using 2P nickel that has the slits. Not a massive difference but noticeable enough to potentially do 0.2mm nickel if your technique with the probes was perfect
Great review.
Did you consider welding multiple of the 0.15 (one on top of the other) to handle more current?
but current would al be drawn through the bottom one so would burn the weld up
@@eliotmansfield that isn't how it works, electricity flows in the shortest distance on the outside of the metal, so no it wouldn't be "drawn" to the bottom. If that was true a faraday cage would never work as the electricity and/or radio signal would just flow to the inside. So what he said does work, you can weld strips on top of each other.
@@michaelcastro5339 if you stack three chairs on top of each other - how many chair legs are touching the ground? The point i’m making is that only the lower strip is welded to the battery terminal - so that’s the weakest spot.
@@eliotmansfield then why doesn’t the bottom 1.5mm of a 3mm flexible copper bus bar carry all the current between 280Ah LiFeP04 cells. The new bus bar designed to prevent terminal stress during expansion are made out of layers of copper. Yes, slightly better in terms of gaps between the copper and gaps between nickel strips but if you are methodical you can keep the strips uniform and flat so succeeding layers make full contact. Why would welding be necessary? I’ve shorted cells just by dropping a piece of nickel between two terminals.
It works. Remember the current flows on the outside of the material. It does work...
Is it nickel or nickel-plated steel?
Hi bro. Love you from India. I just wanna know ? Is it possible to make induction iron (clothing press iron) if possible. could you please make video on it.
Can anyone tell me this is a good pack? cause i’m about to buy 1.
Nice, been looking for one that can handle at least .2 x 10mm or .25 x 8mm. However, for most of the ones from China, I never believe what they say.
Trick is to not use a lot of pressure, just enough, it take some practice to get to know how much exactly but you wont get good weld with lots of downward force
This was provided to you free of charge, or did you pay for it?
Does it have storage mode? The one where device discharges the battery to 50% after not bein used for a week or so. These type of welders are quite problematic to store properly without such feature.
? Please explain.
@@KJ6EAD Fully charged li-ion batteries quickly loose their capacity. And manually discharging a 10A battery to storage voltages is annoying. I've seen that other welders go to storage mode after awhile. Probably just dump charge to an internal resistor.
The li-ion batteries don't loose the capacity at fully charged state. Never buy the welders claimed with automatic storage mode. It comes with the lousy and self-discharge battery.
@@imcrazy886 storing Lithium Ion at 100% SOC is well documented to degrade cells. Saying otherwise is objectively false
I guess it’s good for what it is intended for but I still don’t know if I like it.
How does one tell what size/thickness nickel strip you need for what current? What's the current difference between .15 and .2 strip for current?
You can look up tables. As expected, the current capacity from 0.15 to 0.20 increases proportionally with the thickness by about 30%. Although length of the strips, as well as the material plays a role. Especially cheap strips might just be plated steel instead of pure nickel, which has worse conductivity, and for high amperage applications, aluminum or even copper might be required, although the low resistance means you need an entirely different spot welder.
0.15x8mm I believe is 7A. 0.20mm is about 10A
Remember if you have a 14S10P pack you will have 14 series strings connected with up to 10 points between each string to pass ALL the current. Say you plan on doing 0.15x8mm on all 10 connections. Is 70A enough? Plan on discharging 200A continuous? Bust out the copper.
@@graealex I use a chart that I got from a local welding shop. PURE nickel .15mm×8mm is 4.9 amps, .2mm×8mm is 6.4 amps. If you go to 10mm wide you bump up to .15×10mm is 6.0 amps, .2×10mm is 7.9 amps...
Re: the battery - the first 3 pairs of digits will be the dimensions in mm of each of the packs. '10 70 80' is 10mm thick, 70mm wide, 80mm long. The '20I19' will be probably be some sort of manufacturing date code. Very generally speaking, any LiPo battery will be spec'ed by dimensions like that.
Wish there was more data like a C rating (which I know is pure BS) because my SeeSii is very similar to this and I would like to know what the Lipo is capable of so I can actually do the math to determine if 0.20mm nickel is just out of reach or if I’m barely squeezing out enough juice for 0.15mm. I expect the latter to be true
@@ericklein5097 HI, I see you have a Seesii spot welder. Which model do you have, and how do you like it. I'm just ready to get one, I have 6 Milwaukee power packs to go through. I'm looking at either the 10,000 or 11,000 mAh ones. One has 80 gears, the other 99. On both you can adjust the pulse delay. This one looks pretty good though. The new Seesii' are between 80-$90....Thanks
@@davidbarker3591 David how good are the seesill ones compared with this one in this video ?
🖖 👍
Is this Brand the same that makes this awesome usb powerd Soldering Irons 🤔
You're probably referring to miniware? No, this is not sold by them
I have found that placing the electrodes closer together can make a better weld on thicker materials. The heat from each weld is somewhat shared that way. Its also easy to vaporize the metal in the battery though and cause it to leak electrolyte so it takes practice...
I like video 👍😊
I purchased this and welding 0.2mm Ni strips is a clear no.
The reason for this is the unit is using a single series cell. I measured a discharge current of about 650A when fully charged. The 1S configuration + all the resistance on the welding path limits the discharge current at this value. Any welder using a 1S battery is likely to have this limitation and nothing significant can be done to increase the current.
Otherwise the build and weld quality for thinner strips is good.
Can it be used as a USB powerbank as well?
I didn't see a USB-A socket on the one in the video. So probably not. Most of the othe ones have them.
That USB charger looks MIGHTY USEFUL for Asia/Asia-Pacific. 🤣.
Best of luck charging it with that USB charger!
Any chance you could rephrase this to be semi coherent? In English of course.
If your criticism is the plug may not work in some regions then I’m not sure what to say.
If it’s about the 2A charging speed, again, you’ve done nothing but waste bandwidth.
Nothing unusual about the way this device chargers, or if the rate of the stock hardware provided or any problems with the form factors chosen. My SeeSii clone did not include the brick/adapter but after reading the manual and trying a few different ones I’ve been quite happy with a max charging speed of 2.4A. I’ve never dropped my battery below 90%
These little spot welders are selling a lot so other companies are copies them and sells them but they suck I bought one and I didn't even get a weld before it blew a MOSFET so you need to make sure you are getting it from the real store and the ussaul work.
How does it compare to a Kweld? Cuz my Kweld paired with a good battery works really well.
I've seen some much smaller versions of these online and only cost me like $20-30 shipped. Also did 0.15mm
But Kweld can do a 0.15 copper strip too as a sandwich
kWeld is in a whole nother level. The Sequre SW-1 comes close to the kWeld but I don’t think anyone has made anything remotely close to the Kweld when paired with the correct power source (Turnigy Graphene, large high performance AGM, super cap bank) at 75-100 Joules
.......at 10:40 timeline...thereabouts.....You can tell the cell connectivity just by looking at the back of the shrink wrapped cell pack !!! Getting close to X-ray vision soon.....will not need the fancy screw driver in the future !!! Lol !
Too much max power is better than not enough. Seems underpowered since it's struggling at almost max power even with just .1mm. I'd spend the $ and get something more beefy if I were making high current packs to sell on eBay or something that used 0.25mm+. In a pinch for a single pack a junk-box one can be built from a high current scr (100A+) controlling a 35V .56F capacitor and will weld just about any available thickness of nickel strip (electrodes made from sharpened solid 8 awg copper wire, power controlled by a cheap 0-30v 0-10A DC supply).
On its LCD, the white text on pastel background is hard to read, at least in the video. Black text would have been better.
by my testing they perform better while plugged in to have its top charge
edit: just got my kWeld, and fuck me that is an insane difference
i thought i had genuine nickel but it's nickel plated steel apparently, what the Sequre done well at 50%-70% of spotweld time, the kWeld does at only 10J Lol
yea the Sequre is almost a toy by comparison
hit the same weld twice in rapid succession.
*I bought one , it did 391 nice welds then started giving trouble. I sent a video to the company and I am awaiting a reply from them.
You could just double up on the strips
I don't mind spending good money on a tool, but since it has a non standard battery, the battery will most likely die within a few years and you won't be able to replace it.
You seem to be pressing to hard. That creates more contact surface, spreading the current flow/heat. A lighter touch focuses the heat to a smaller area.
I really think you are applying TOO much pressure on the leads..
I ordered the exact unit and I'm hoping it works well....for what I'm using it for. 1or 1.5 should be fine.
This my firneds is how you increase a profit margin.
I have the same thing and I wish I would have just gotten the bigger model for another 100 bucks. it's not powerful enough for reclaimed cells,since they are never exactly perfect after being welded. even grinding the ends down flat still not able to get solid welds. it's weak.. and inconsistent with varying weld strength. save your money and buy something more powerful
bad welds can be very dangerous.
if you re not a professional you dont really need it.. i hat to make a battery that had 40 batteries i did it with a 20USD module and it is all fine..
Spot welders from China have become so cheap (starts at around $35) that they have become a basic tool affordable even by hobbyists.
If you need to discharge any amount of current from your battery you will need a device that can do 0.15mm thick nickel.
I have not seen any of the sun $40 units weld 0.15mm very well.
Discount code no worky worky.
.15 mm strip = Weak Sauce
this is expensive in d days,😒😒
i tig weld mine quicker.